Albert system
From Wikipedia, the free encyclopedia

The Albert system refers to a system of clarinet keywork and fingering developed by Eugène Albert. In England it is known as the simple system. The Albert system is still used, mainly by clarinetists who perform Eastern European and Turkish folk music, Klezmer, and Dixieland styles. Often these musicians prefer the Albert system due to the ease of slurring notes provided by unkeyed tone holes.
The system is a derivative of the early 19th century 13-key system developed by Iwan Müller and as such is related to the (somewhat more complex) Oehler system used by most German and Austrian clarinetists.